Utah's state rock (4)
I believe the answer is:
coal
(Other definitions for coal that I've seen before include "Carbonized vegetable matter" , "Carbon fuel" , "Carbonaceous rock used as fuel" , "Black mineral used for burning" , "Char" .)
I believe the answer is:
coal
(Other definitions for coal that I've seen before include "Carbonized vegetable matter" , "Carbon fuel" , "Carbonaceous rock used as fuel" , "Black mineral used for burning" , "Char" .)